Here was Meraki supports response:     It appears the attempt was blocked by Snort but it doesn't look like this is a known issue but it appears similar enough to something that is known hence it was blocked by Snort. Meraki Support isn't actually able to make changes to the existing security policies as they are provided by a 3rd party.  We can, however, bring it to their attention and they are constantly providing security updates.  Unfortunately we have to wait for a Meraki Firmware update as the changes are baked into the firmware etc. ... View more